======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '160'
                                          'artist'  'Ink Spots'
                                     'text_people'  ''
                                         'release'  'Whispering Grass'
                                           'title'  'Swing High, Swing Low'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'swing', '40s', 'vocal jazz', 'oldies']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '20'
                                      'tracktotal'  '22'
                                            'date'  '1996'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '104.175'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 00000165 00000165 00001E2F'
'COMM:iTunNORM:eng'                                 (' 00000165 00000165 00001E2F 00001E2F 0001E3E0 0001E3E0 00005775 00005775 '
 '00000605 00000605')
'COMM:iTunes_CDDB_IDs:eng'                          '22+F07D7A442F235F4A3D5DCE95C5E496C5+906816'
'TALB' (Album/Movie/Show title)                     'Whispering Grass'
'TBPM' (BPM (beats per minute))                     '104.175'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1996'
'TENC' (Encoded by)                                 'iTunes v4.7.1.30'
'TIT2' (Title/songname/content description)         'Swing High, Swing Low'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ink Spots'
'TPE2' (Band/orchestra/accompaniment)               'Ink Spots'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '20/22'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz', 'swing', '40s', 'vocal jazz', 'oldies']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.24 dB'
'TXXX:replaygain_track_peak'                        '0.567697'

========================== row from database ==========================
                                              'id'  770458
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Whispering Grass/20 Swing High, Swing Low.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  160
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  3854336
                                           'mtime'  1620537268
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 20 prerock jb jazz unsorted
                                      'tag_artist'  Ink Spots
                                     'tag_release'  Whispering Grass
                                       'tag_title'  Swing High, Swing Low
                                             'bpm'  104.175
                                    'search_title'  'high':2,3 'low':4 'swing':1
                                   'search_artist'  'ink':1 'spots':2
                                  'search_release'  'grass':2 'whispering':1
                                     'search_rest'  '20':5 'country':4 'exotica':2 'jazz':1 'jb':7 'oldies':3 'prerock':6 'unsorted':8
                                    'search_combo'  '20':13 'country':12 'exotica':10 'grass':8C 'high':2A,3A 'ink':5B 'jazz':9 'jb':15 'low':4A 'oldies':11 'prerock':14 'spots':6B 'swing':1A 'unsorted':16 'whispering':7C
                                    'tag_tracknum'  20
                                      'num_images'  1
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'swing', '40s', 'vocal jazz', 'oldies']
                                        'tag_date'  1996
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620537267.9395363  (2021-05-09 07:14:27)
                             'size'  3854336